&GAS: INTERPOLATION
The table item for which you wish to alter the interpolation
method.
---------------------------------------------------------------
Keyword Meaning
---------------------------------------------------------------
ATTACHMENT-COEFFICIENT Attachment coefficient of electrons
DRIFT-VELOCITY Electron drift velocity
ION-MOBILITY Mobility of ions
LONGITUDINAL-DIFFUSION Logitudinal diffusion of electrons
LORENTZ-ANGLE Lorentz angle of electrons
TOWNSEND-COEFFICIENT Townsend coefficient of electrons
TRANSVERSE-DIFFUSION Transverse diffusion of electrons
---------------------------------------------------------------
The interpolation method to be used. The basic choice is between
cubic splines and polynomial Newton interpolation.
Spline interpolation leads to smooth looking graphs, but tends to
oscillate making the method less suited for numerical calculations.
Spline interpolation can not be used on the 2-dimensional gas
tables that are produced by programs like Magboltz when a magnetic
field is present.
The order of polynomial interpolation must be between 1 and the
smallest of the two numbers: 10 and number of table entries - 1.
Orders larger than 2 are not recommended.
Formats:
INTERPOLATION item SPLINES
INTERPOLATION item NEWTON order
---------------------------------------------------------------
Method Effect Use
---------------------------------------------------------------
SPLINES Cubic spline interpolation only 1-D
NEWTON n Polynomial interpolation of order n 1-D or 2-D
LINEAR Linear interpolation (= NEWTON 1) 1-D or 2-D
QUADRATIC Parabolic interpolation (=NEWTON 2) 1-D or 2-D
CUBIC Cubic interpolation (=NEWTON 3) 1-D or 2-D
---------------------------------------------------------------
Keyword index.
Formatted on 10/11/98.